Fuse 5 Blows When shift to reverse. V8 5.4
I have a bug that is driving me up the wall in my 2001 F-150. Whenever I shift to reverse my #5 fuse blows 95% of the time.....not all the time. This fuse is linked to the backup light, the climate control and the safety neutral switch. I've removed the bed looking for freyed or pinched wires and found nothing. I've removed the bulbs, put it in R, fuse blows. I've disconnected the backup light harness at the rear, put in R and it blows. The only time it doesn't blow is when the safety N switch is disconnected. So thought it was a bad switch. Bought a new one, put it on, put in R and the fuse blew. When the fuse blows, I have no backup lights and the A/C blows warm air. I recently had to replace the heater core and was wondering if water leaking from it got into the blend door motor and could possibly be causing the short since it's connected to the climate control selector. I'm desperate now and trying anything. Any help is appreciated. Also when I dropped the dash, to put in the core, I noticed that there's a switch on the steering column that has a plastic button on top and has three wires running to it. When the shift is in D, the button is pressed all the way in, in R it's released half way and from N thru D3 it's not engaged at all. I'm wondering if that could be the culprit. Does anyone know the name for this "switch" that I'm trying to describe? Any help is appreciated......thanks guys!